Machine for separating slate from coal



(No Model.)

C. W. ZIEGLER.

MACHINE FOR SEPARATING SLATE FROM GOAL. No. 291,123., Patented Jan. 1, 1884.

' a, g 5 i UNITED STATES PATENT OFFICE.

CHARLES W. ZIEGLER, OF SORANTON, PENNSYLVANIA.

MACHINE FOR SEPARATlNG SLATE FROM COAL.

SPECIFICATIONforming part of Letters Patent No. 291.123, dated January 1, 1854. i 1 Application filed October 13, 1883. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES W. ZIEGLER, a citizen of the United States, residing at Scranton, in the county of Lackawanna and State of Pennsylvania, have invented certain new and useful Improvements in Machines for Separating Slate from Goal, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to an improvementto the invention described in Patent N 0. 277,530, granted to me May 15, 1883,- for improvement in machines for separating slate and other like impurities from broken coal; and it consists in the construction of the parts, their relation, arrangement, and combination with each other in completed machines, as will be fully hereinafter described.

In the drawings, Figure 1 represents a top or plan view, and Fig. 2 represents a longitudinal sectional view on line y 3 of Fig. 1.

-A represents the supporting -frame of the actuating parts of the machine.

B is a transverse revolving cylinder fast to or around shaft a, which freely revolves in proper bearings in frame A. a B is another transverse revolving cylinder fast to or around shaft a, that revolves in bearings in or attached to frame A. The bearings in which the cylinders B and B revolve are on an inclined line, cylinder B being on a lower plane than B, as seen in Fig. 2.

O is an inclined chute or apron, to receive the broken coal and slate as they fall from the breaker or screen, and is of heavy sheet or cast iron or other suitable material.

C is a horizontal or level part of chute O, and may be of any proper extent found necessary in practice, according to the size and condition of the coal to be separated.

c is a short ascending part of the chute G, terminating in the point 0, which is of the same height, or about the same height, as the topof cylinder B, and from point 0 it drops perpendicularly to the same plane with 0, forms the horizontal portion 0 of the chute, and terminates near to, but below, the upper or top part of cylinder B. The level part0 and the raised part c retard the slate, while the coal is in no way stopped. This construction greatly favors separation.

i D is a second chute, located between cylinders B and B, with a space, D, between its upper edge and cylinder B, to permit the flat slate and other small impurities to fall between it and cylinder B, and it otherwise has the same general form of construction as chute 0, except that in length it is, or may be, much said cylinder, while its lower or bottom edge terminates at and joins with the upper edge of the coal box or trough E, into which the clean coal falls.

I .F and F are two transverse cylinders placed below, in advance of, and on a parallel linewith, cylinders Band B, Fig. 2. Cylinder F is fast on and around shaft f, and cylinder F is fast on and around shaft f, which shafts f and f revolve in proper bearings in frame A.

i G is a chute or apron located below or underneath chute D and above cylinder F, and is of the same general form of construction as chutes O and D, and receives the slate and im-- between cylinder B and the upper edge of chute D.

G is another chute, having the same general form of upper surface as chutes O, D, and G, and it is located below inclined plane E and between cylinders F and F, with a space, 9, between its upper edge and cylinder F, and it receives the coal that has passed over chute G and cylinder F and over opening 9, as well as the slate and small particles that have passed through opening 6, below cylinder B, and fall upon the incline plane 9.

H is the lower inclined plane that receives the clean coal that has passed over cylinder F, while the separated slate, that has passed through the opening h, between the upper edge of the inclined plane H and cylinder F, falls into a receptacle below. Q

I is a coal-box below incline II, that receives the clean coal from the auxiliary or secondary separator.

J and J are boxes to receive the slate that passes through spaces g and h, the bottoms of which may be inclined, so as to cause the slate to slide out at one side of the separator. The bottoms ofboxes Eand I may also be soinclined as to cause the clean coal to pass out at either side of the separator.

K is the driving-pulley fast on shaft (1, and receives motion from any convenient power through a moving belt.

K is a pulley fast on the other end of shaft, (1, and It is a belt around pulley K, and goes around pulley Z on shaft a.

Z is a pulley on shaft a, and Z is a belt passing around pulley I, thence around pulley m on shaft f to revolve cylinder F. The arrows in Fig. 2 indicate the direction that the several cylinders revolve. A train of toothed gear wheels to revolve the cylinders may be used instead of pulleys and belts, or another wellknown means for revolving the cylinders may be used as well.

It is evident that if sufficient inclination be given to the chutes and the cylinders above de scribed, with their relative location to each other and their construction, it would not be necessary to revolve the cylinders, as the momentum given the coal by the inclination of the chutes would, by gravity, in connection with the form they have, carry the coal and slate forward over the curved stationary sun faces of the cylinders, to be separated the same as would be the case if the cylinders revolved and the chutes and cylinders had less inclination from a horizontal position. The broken and sized coal falling from the screen with the slate falls upon the inclined chute C, which gives sufficient motion to the coal and slate to force them along the level part 0, to and over the raised point 0, when it falls down upon the level part 0 under motion enough in the coal and slate to go onto and over the revolving cylinder B. The specific gravity of slate being greater than that of coal, and having flat surfaces, which coal has not, the slate will naturally be underneath the coal in passing downward upon the chutes, and by being in contact with the chutes and inclines the frietion is greater upon the slate than upon the coal, the particles of which roll and tumble along over the slate and over the cylinders, while the slate slides 011 the face of the chutes and over the rises on the faces or surfaces (points 0 or d) of the chutes; and when it falls from said points 0 or d, to go onto the cylinders, it will be in the best position to be precipitated through the spaces D or c, together with other impurities, upon the secondary or auxiliaryseparator, (the chutes G G and cylinders F and F,) where the final and complete separation ofslate from the coal takes place.

The coal, by the first separation, falls into the coal box or receiver E, and that from the second separation into box I, while all the slate and impurities are deposited in boxes J and J.

Having thus described my invention, what I claim, and desire to secure by Letters Patent,

1. In a coal-separator, the combination of aprons or chutes O, I), G, and G, each having a descending incline. a level portion, an ascending part, a perpendicular offset, and a second horizontal part, and the cylinders, substantially as described.

2. The combination ofthe aprons or chutes O and D, constructed, as described, with the revolving cylinders 13 and B, forming, with said chutes, the spaces D and c, and the incline E, as and for the purposes described.

3. In a coal-separator, the combination of the aprons or chutes C and D, cylinders B and B, the secondary aprons or chutes G and G, and cylinders F and F, forming with the said chutes G and G openings g and h, as described.

In testimony whereofl affix my signature in presence of two witnesses.

CHARLES \V. ZIEGLER.

\Vitnessev:

Nnw'rox ()nawronn, Geo. W. MoRRILL. 

